injectors not firing, but have power

[tractorboy]

I seem to have a problem with my injectors not firing.

 

This problem has only started since I have upgraded to a electrical dizzy as my stock one failed.

 

I have checked the basic wiring and all seems to be good, it appears the ecu is not sending a siginal to the injectors. I have power at all of the injectors.

 

Does anyone think that the problem is connected to the new dizzy? So far I have replaced the fuel pump relay and my next idea would be to replace the ECU

 

Any ideas would be great,

 

Thanks

[NewZed]

The blue wire from the coil negative terminal to Pin 1 of the ECU may not be connected. Assuming that you have spark.

 

The ECU doesn't send a signal to the injectors, it just grounds the circuit every three coil discharges. It "sees" the coil discharge through the wire from the coil negative.

 

You most likely had an electronic ignition system before since all of the EFI engines came with them, so your comment about upgrading to electrical (assume you meant electronic) doesn't make sense. If you swapped in a ZX distributor with the "matchbox' on the side, you might not have disconnected the other ignition module in the cabin. That might screw up the signal to the ECU.

 

Type and year of car would make things more clear.

[tractorboy]

Sorry for being a bit vague

 

It's a 76 280z and I'm not getting a ground from the ecu.

 

And yes I've done the zx upgrade with the distributor, and have removed the orginal igniter which sits on the passenger side of the car.

 

I have a spark but will check the ecu wiring

 

Thanks for your info ill let u know how I get on

[tractorboy]

So I have continuity from the coil to ECU.

 

Have read on a different forum that the tacho needs to be connected to enable the injectors to fire. Not sure if this is true but I will check the wiring just incase